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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsAbRDFDataSource_h__
#define nsAbRDFDataSource_h__


#include "nsCOMPtr.h"
#include "nsIRDFDataSource.h"
#include "nsIRDFService.h"
#include "nsISupportsArray.h"
#include "nsString.h"

/**
 * The addressbook data source.
 */
class nsAbRDFDataSource : public nsIRDFDataSource
{
public:
	NS_DECL_ISUPPORTS
	NS_DECL_NSIRDFDATASOURCE

	nsAbRDFDataSource();
	virtual ~nsAbRDFDataSource();
  
protected:

	nsresult createNode(const PRUnichar *str, nsIRDFNode **node);
  nsresult createBlobNode(PRUint8 *value, PRUint32 &length, nsIRDFNode **node, nsIRDFService *rdfService);

	nsresult NotifyPropertyChanged(
		nsIRDFResource *resource,
		nsIRDFResource *propertyResource,
		const PRUnichar *oldValue,
		const PRUnichar *newValue);

	nsresult NotifyObservers(
		nsIRDFResource *subject,
		nsIRDFResource *property,
		nsIRDFNode *object,
		PRBool assert,
		PRBool change);

	nsresult CreateProxyObservers ();

	nsresult CreateProxyObserver (
		nsIRDFObserver* observer,
		nsIRDFObserver** proxyObserver);

	static PRBool assertEnumFunc(nsISupports *aElement, void *aData);
	static PRBool unassertEnumFunc(nsISupports *aElement, void *aData);
	static PRBool changeEnumFunc(nsISupports *aElement, void *aData);

private:
	nsCOMPtr<nsISupportsArray> mObservers;
	nsCOMPtr<nsISupportsArray> mProxyObservers;

	PRLock* mLock;
};

#endif